timestamp field may be int64, uint64, int32, uint32, float32, float64.

build win32

decrease default ReadBufferSize = 64KB. 1MB is overspec for most usec…

…ases.

add benchmark result

fix died when config.Receiver isn't defined.

short cut bytes.LastIndex() when read buffer is just terminated by '\…

…n' (it is most of cases).

add waiting channel